1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "crypto/encryptor.h" 6 7 #include <string> 8 9 #include "base/memory/scoped_ptr.h" 10 #include "base/string_number_conversions.h" 11 #include "crypto/symmetric_key.h" 12 #include "testing/gtest/include/gtest/gtest.h" 13 14 TEST(EncryptorTest, EncryptDecrypt) { 15 scoped_ptr<crypto::SymmetricKey> key( 16 crypto::SymmetricKey::DeriveKeyFromPassword( 17 crypto::SymmetricKey::AES, "password", "saltiest", 1000, 256)); 18 EXPECT_TRUE(NULL != key.get()); 19 20 crypto::Encryptor encryptor; 21 // The IV must be exactly as long as the cipher block size. 22 std::string iv("the iv: 16 bytes"); 23 EXPECT_EQ(16U, iv.size()); 24 EXPECT_TRUE(encryptor.Init(key.get(), crypto::Encryptor::CBC, iv)); 25 26 std::string plaintext("this is the plaintext"); 27 std::string ciphertext; 28 EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext)); 29 30 EXPECT_LT(0U, ciphertext.size()); 31 32 std::string decypted; 33 EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted)); 34 35 EXPECT_EQ(plaintext, decypted); 36 } 37 38 // TODO(wtc): add more known-answer tests. Test vectors are available from 39 // http://www.ietf.org/rfc/rfc3602 40 // http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf 41 // http://gladman.plushost.co.uk/oldsite/AES/index.php 42 // http://csrc.nist.gov/groups/STM/cavp/documents/aes/KAT_AES.zip 43 44 // NIST SP 800-38A test vector F.2.5 CBC-AES256.Encrypt. 45 TEST(EncryptorTest, EncryptAES256CBC) { 46 // From NIST SP 800-38a test cast F.2.5 CBC-AES256.Encrypt. 47 static const unsigned char raw_key[] = { 48 0x60, 0x3d, 0xeb, 0x10, 0x15, 0xca, 0x71, 0xbe, 49 0x2b, 0x73, 0xae, 0xf0, 0x85, 0x7d, 0x77, 0x81, 50 0x1f, 0x35, 0x2c, 0x07, 0x3b, 0x61, 0x08, 0xd7, 51 0x2d, 0x98, 0x10, 0xa3, 0x09, 0x14, 0xdf, 0xf4 52 }; 53 static const unsigned char raw_iv[] = { 54 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 55 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f 56 }; 57 static const unsigned char raw_plaintext[] = { 58 // Block #1 59 0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 60 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a, 61 // Block #2 62 0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 63 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51, 64 // Block #3 65 0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 66 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef, 67 // Block #4 68 0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 69 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10, 70 }; 71 static const unsigned char raw_ciphertext[] = { 72 // Block #1 73 0xf5, 0x8c, 0x4c, 0x04, 0xd6, 0xe5, 0xf1, 0xba, 74 0x77, 0x9e, 0xab, 0xfb, 0x5f, 0x7b, 0xfb, 0xd6, 75 // Block #2 76 0x9c, 0xfc, 0x4e, 0x96, 0x7e, 0xdb, 0x80, 0x8d, 77 0x67, 0x9f, 0x77, 0x7b, 0xc6, 0x70, 0x2c, 0x7d, 78 // Block #3 79 0x39, 0xf2, 0x33, 0x69, 0xa9, 0xd9, 0xba, 0xcf, 80 0xa5, 0x30, 0xe2, 0x63, 0x04, 0x23, 0x14, 0x61, 81 // Block #4 82 0xb2, 0xeb, 0x05, 0xe2, 0xc3, 0x9b, 0xe9, 0xfc, 83 0xda, 0x6c, 0x19, 0x07, 0x8c, 0x6a, 0x9d, 0x1b, 84 // PKCS #5 padding, encrypted. 85 0x3f, 0x46, 0x17, 0x96, 0xd6, 0xb0, 0xd6, 0xb2, 86 0xe0, 0xc2, 0xa7, 0x2b, 0x4d, 0x80, 0xe6, 0x44 87 }; 88 89 std::string key(reinterpret_cast<const char*>(raw_key), sizeof(raw_key)); 90 scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import( 91 crypto::SymmetricKey::AES, key)); 92 ASSERT_TRUE(NULL != sym_key.get()); 93 94 crypto::Encryptor encryptor; 95 // The IV must be exactly as long a the cipher block size. 96 std::string iv(reinterpret_cast<const char*>(raw_iv), sizeof(raw_iv)); 97 EXPECT_EQ(16U, iv.size()); 98 EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv)); 99 100 std::string plaintext(reinterpret_cast<const char*>(raw_plaintext), 101 sizeof(raw_plaintext)); 102 std::string ciphertext; 103 EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext)); 104 105 EXPECT_EQ(sizeof(raw_ciphertext), ciphertext.size()); 106 EXPECT_EQ(0, memcmp(ciphertext.data(), raw_ciphertext, ciphertext.size())); 107 108 std::string decypted; 109 EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted)); 110 111 EXPECT_EQ(plaintext, decypted); 112 } 113 114 // Expected output derived from the NSS implementation. 115 TEST(EncryptorTest, EncryptAES128CBCRegression) { 116 std::string key = "128=SixteenBytes"; 117 std::string iv = "Sweet Sixteen IV"; 118 std::string plaintext = "Plain text with a g-clef U+1D11E \360\235\204\236"; 119 std::string expected_ciphertext_hex = 120 "D4A67A0BA33C30F207344D81D1E944BBE65587C3D7D9939A" 121 "C070C62B9C15A3EA312EA4AD1BC7929F4D3C16B03AD5ADA8"; 122 123 scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import( 124 crypto::SymmetricKey::AES, key)); 125 ASSERT_TRUE(NULL != sym_key.get()); 126 127 crypto::Encryptor encryptor; 128 // The IV must be exactly as long a the cipher block size. 129 EXPECT_EQ(16U, iv.size()); 130 EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv)); 131 132 std::string ciphertext; 133 EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext)); 134 EXPECT_EQ(expected_ciphertext_hex, base::HexEncode(ciphertext.data(), 135 ciphertext.size())); 136 137 std::string decypted; 138 EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted)); 139 EXPECT_EQ(plaintext, decypted); 140 } 141 142 // Expected output derived from the NSS implementation. 143 TEST(EncryptorTest, EncryptAES192CBCRegression) { 144 std::string key = "192bitsIsTwentyFourByte!"; 145 std::string iv = "Sweet Sixteen IV"; 146 std::string plaintext = "Small text"; 147 std::string expected_ciphertext_hex = "78DE5D7C2714FC5C61346C5416F6C89A"; 148 149 scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import( 150 crypto::SymmetricKey::AES, key)); 151 ASSERT_TRUE(NULL != sym_key.get()); 152 153 crypto::Encryptor encryptor; 154 // The IV must be exactly as long a the cipher block size. 155 EXPECT_EQ(16U, iv.size()); 156 EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv)); 157 158 std::string ciphertext; 159 EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext)); 160 EXPECT_EQ(expected_ciphertext_hex, base::HexEncode(ciphertext.data(), 161 ciphertext.size())); 162 163 std::string decypted; 164 EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted)); 165 EXPECT_EQ(plaintext, decypted); 166 } 167 168 // Not all platforms allow import/generation of symmetric keys with an 169 // unsupported size. 170 #if !defined(OS_WIN) && !defined(USE_NSS) 171 TEST(EncryptorTest, UnsupportedKeySize) { 172 std::string key = "7 = bad"; 173 std::string iv = "Sweet Sixteen IV"; 174 scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import( 175 crypto::SymmetricKey::AES, key)); 176 ASSERT_TRUE(NULL != sym_key.get()); 177 178 crypto::Encryptor encryptor; 179 // The IV must be exactly as long a the cipher block size. 180 EXPECT_EQ(16U, iv.size()); 181 EXPECT_FALSE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv)); 182 } 183 #endif // unsupported platforms. 184 185 TEST(EncryptorTest, UnsupportedIV) { 186 std::string key = "128=SixteenBytes"; 187 std::string iv = "OnlyForteen :("; 188 scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import( 189 crypto::SymmetricKey::AES, key)); 190 ASSERT_TRUE(NULL != sym_key.get()); 191 192 crypto::Encryptor encryptor; 193 EXPECT_FALSE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv)); 194 } 195 196 TEST(EncryptorTest, EmptyEncrypt) { 197 std::string key = "128=SixteenBytes"; 198 std::string iv = "Sweet Sixteen IV"; 199 std::string plaintext; 200 std::string expected_ciphertext_hex = "8518B8878D34E7185E300D0FCC426396"; 201 202 scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import( 203 crypto::SymmetricKey::AES, key)); 204 ASSERT_TRUE(NULL != sym_key.get()); 205 206 crypto::Encryptor encryptor; 207 // The IV must be exactly as long a the cipher block size. 208 EXPECT_EQ(16U, iv.size()); 209 EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv)); 210 211 std::string ciphertext; 212 EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext)); 213 EXPECT_EQ(expected_ciphertext_hex, base::HexEncode(ciphertext.data(), 214 ciphertext.size())); 215 } 216 217 TEST(EncryptorTest, EmptyDecrypt) { 218 std::string key = "128=SixteenBytes"; 219 std::string iv = "Sweet Sixteen IV"; 220 221 scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import( 222 crypto::SymmetricKey::AES, key)); 223 ASSERT_TRUE(NULL != sym_key.get()); 224 225 crypto::Encryptor encryptor; 226 // The IV must be exactly as long a the cipher block size. 227 EXPECT_EQ(16U, iv.size()); 228 EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv)); 229 230 std::string decrypted; 231 EXPECT_FALSE(encryptor.Decrypt("", &decrypted)); 232 EXPECT_EQ("", decrypted); 233 } 234
